From ten call-outs a month to none.

Sheet 02 · The brief

The only lift in the building.

Over ten call-outs in a matter of weeks, on the one lift serving every floor. With no second car to fall back on, each fault meant residents trapped in the car or stuck on the stairs, and another out of order sign in the lobby.

Until then the routine had been the same every time: reset the controller, hand the lift back, wait for the next call. Instead of resetting it and leaving, our engineer booked the time to work through the lift properly.

Sheet 03 · Diagnosis

We read every fault.

Not a reset. A full diagnosis. The controller logs every fault it has ever tripped, and we read all of it before touching a component. Three fault families kept repeating, and together they pointed at the drive, its programming and the brake.

Sheet 04 · Repair 01

We refurbished the drive.

The variable-frequency drive that controls the motor was at the centre of the fault log. It was stripped, refurbished and rebuilt rather than reset and ignored, with its line filtering checked through at the same time.

Sheet 05 · Repair 02

Then reprogrammed it.

Brake timing and motion curves, retuned value by value at the controller. The photograph shows the brake on delay set to 0.80 seconds, one of the parameters that decides whether a lift stops cleanly or trips itself out.

Sheet 06 · Repair 03

And re-set the brake.

By hand, to the right tension, so the mechanical brake and the reprogrammed drive engage and release in step. It is exactly the kind of adjustment a remote reset never touches, and it is where the repeat faults finally stopped.

Sheet 07 · Back in service

Running quiet again.

The traction machine back under load, running clean through its full travel. No noise, no nuisance trips, no drama. The building got its lift back, and this time it stayed back.

Sheet 08 · Outcome

From ten to none.

Zero call-outs and zero downtime in the three months since the repair. Several faults, found and fixed at the cause, on a maintenance approach built around reading the lift rather than resetting it.